diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 51f4221..18babaf 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -263,7 +263,7 @@ Code  Seq#(hex)	Include File		Comments
 's'	all	linux/cdk.h
 't'	00-7F	linux/ppp-ioctl.h
 't'	80-8F	linux/isdn_ppp.h
-'t'	90	linux/toshiba.h
+'t'	90-91	linux/toshiba.h		toshiba and toshiba_acpi SMM
 'u'	00-1F	linux/smb_fs.h		gone
 'u'	20-3F	linux/uvcvideo.h	USB video class host driver
 'v'	00-1F	linux/ext2_fs.h		conflict!
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 58d6119..dc4255b 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -50,6 +50,8 @@
 #include <linux/acpi.h>
 #include <linux/dmi.h>
 #include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/toshiba.h>
 #include <acpi/video.h>
 
 MODULE_AUTHOR("John Belmonte");
@@ -170,6 +172,7 @@ struct toshiba_acpi_dev {
 	struct led_classdev led_dev;
 	struct led_classdev kbd_led;
 	struct led_classdev eco_led;
+	struct miscdevice miscdev;
 
 	int force_fan;
 	int last_key_event;
@@ -2262,6 +2265,81 @@ static struct attribute_group toshiba_attr_group = {
 };
 
 /*
+ * Misc device
+ */
+static int toshiba_acpi_smm_bridge(SMMRegisters *regs)
+{
+	u32 in[TCI_WORDS] = { regs->eax, regs->ebx, regs->ecx,
+			      regs->edx, regs->esi, regs->edi };
+	u32 out[TCI_WORDS];
+	acpi_status status;
+
+	status = tci_raw(toshiba_acpi, in, out);
+	if (ACPI_FAILURE(status)) {
+		pr_err("ACPI call to query TCI registers failed\n");
+		return -EIO;
+	}
+
+	/* Fillout the SMM struct with the TCI call results */
+	regs->eax = out[0];
+	regs->ebx = out[1];
+	regs->ecx = out[2];
+	regs->edx = out[3];
+	regs->esi = out[4];
+	regs->edi = out[5];
+
+	return 0;
+}
+
+static long toshiba_acpi_ioctl(struct file *fp, unsigned int cmd,
+			       unsigned long arg)
+{
+	SMMRegisters __user *argp = (SMMRegisters __user *)arg;
+	SMMRegisters regs;
+	int ret;
+
+	if (!argp)
+		return -EINVAL;
+
+	switch (cmd) {
+	case TOSH_SMM:
+		if (copy_from_user(&regs, argp, sizeof(SMMRegisters)))
+			return -EFAULT;
+		ret = toshiba_acpi_smm_bridge(&regs);
+		if (ret)
+			return ret;
+		if (copy_to_user(argp, &regs, sizeof(SMMRegisters)))
+			return -EFAULT;
+		break;
+	case TOSHIBA_ACPI_SCI:
+		if (copy_from_user(&regs, argp, sizeof(SMMRegisters)))
+			return -EFAULT;
+		/* Ensure we are being called with a SCI_{GET, SET} register */
+		if (regs.eax != SCI_GET && regs.eax != SCI_SET)
+			return -EINVAL;
+		if (!sci_open(toshiba_acpi))
+			return -EIO;
+		ret = toshiba_acpi_smm_bridge(&regs);
+		sci_close(toshiba_acpi);
+		if (ret)
+			return ret;
+		if (copy_to_user(argp, &regs, sizeof(SMMRegisters)))
+			return -EFAULT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct file_operations toshiba_acpi_fops = {
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl = toshiba_acpi_ioctl,
+	.llseek		= noop_llseek,
+};
+
+/*
  * Hotkeys
  */
 static int toshiba_acpi_enable_hotkeys(struct toshiba_acpi_dev *dev)
@@ -2559,6 +2637,8 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
 {
 	struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
 
+	misc_deregister(&dev->miscdev);
+
 	remove_toshiba_proc_entries(dev);
 
 	if (dev->sysfs_created)
@@ -2630,6 +2710,17 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
 		return -ENOMEM;
 	dev->acpi_dev = acpi_dev;
 	dev->method_hci = hci_method;
+	dev->miscdev.minor = MISC_DYNAMIC_MINOR;
+	dev->miscdev.name = "toshiba_acpi";
+	dev->miscdev.fops = &toshiba_acpi_fops;
+
+	ret = misc_register(&dev->miscdev);
+	if (ret) {
+		pr_err("Failed to register miscdevice\n");
+		kfree(dev);
+		return ret;
+	}
+
 	acpi_dev->driver_data = dev;
 	dev_set_drvdata(&acpi_dev->dev, dev);
 
diff --git a/include/uapi/linux/toshiba.h b/include/uapi/linux/toshiba.h
index e9bef5b..c58bf4b 100644
--- a/include/uapi/linux/toshiba.h
+++ b/include/uapi/linux/toshiba.h
@@ -1,6 +1,7 @@
 /* toshiba.h -- Linux driver for accessing the SMM on Toshiba laptops 
  *
  * Copyright (c) 1996-2000  Jonathan A. Buzzard (jonathan@buzzard.org.uk)
+ * Copyright (c) 2015  Azael Avalos <coproscefalo@gmail.com>
  *
  * Thanks to Juergen Heinzl <juergen@monocerus.demon.co.uk> for the pointers
  * on making sure the structure is aligned and packed.
@@ -20,9 +21,18 @@
 #ifndef _UAPI_LINUX_TOSHIBA_H
 #define _UAPI_LINUX_TOSHIBA_H
 
-#define TOSH_PROC "/proc/toshiba"
-#define TOSH_DEVICE "/dev/toshiba"
-#define TOSH_SMM _IOWR('t', 0x90, int)	/* broken: meant 24 bytes */
+/*
+ * Toshiba modules paths
+ */
+
+#define TOSH_PROC		"/proc/toshiba"
+#define TOSH_DEVICE		"/dev/toshiba"
+#define TOSHIBA_ACPI_PROC	"/proc/acpi/toshiba"
+#define TOSHIBA_ACPI_DEVICE	"/dev/toshiba_acpi"
+
+/*
+ * Toshiba SMM structure
+ */
 
 typedef struct {
 	unsigned int eax;
@@ -33,5 +43,21 @@ typedef struct {
 	unsigned int edi __attribute__ ((packed));
 } SMMRegisters;
 
+/*
+ * IOCTLs (0x90 - 0x91)
+ */
+
+#define TOSH_SMM		_IOWR('t', 0x90, SMMRegisters)
+/*
+ * Convenience toshiba_acpi command.
+ *
+ * The System Configuration Interface (SCI) is opened/closed internally
+ * to avoid userspace of buggy BIOSes.
+ *
+ * The toshiba_acpi module checks whether the eax register is set with
+ * SCI_GET (0xf300) or SCI_SET (0xf400), returning -EINVAL if not.
+ */
+#define TOSHIBA_ACPI_SCI	_IOWR('t', 0x91, SMMRegisters)
+
 
 #endif /* _UAPI_LINUX_TOSHIBA_H */
